Ghost Performer

This wasn't something I should have been thinking about...

But when I struck the last key and typed the final word, I saw someone behind me...

He was just standing there, watching me. The breeze made me feel chilly. I must have left the window open...

I got up to close it, then picked up the kettle and poured some boiling water. But I only had one cup, so I didn't pour him any...

Still, I asked him, “Would you like some water?”

He shook his head.